cmake: Remove config.guess

[tstellar]

Summary

We are unable to update config.guess to a newer version since its
license is different than the license we use for llvm. Therefore, any
new host triple detection code needs to be done using CMake. Rather than have
some triple detection in CMake and some in config.guess, I think it
would be better to move all triple detection code into CMake.

This patch replaces config.guess with some logic that uses the host
compiler to determine the host's triple.

In the case where the CMake detection fails, the user can still manually
specify the host triple using -DLLVM_HOST_TRIPLE.

When using gcc or clang as the host compiler, this patch should make
host triple detection more accurate, since config.guess was returning
the wrong value on some systems.

[MaskRay]

llvm/CMakeLists.txt

479 ↗

(On Diff #372734)

Remove trailing . for the help message to be consistent with other options.

llvm/cmake/modules/GetHostTriple.cmake

71

Mention -DLLVM_HOST_TRIPLE=?

Seems that LLVM_HOST_TRIPLE is used to initialize LLVM_DEFAULT_TARGET_TRIPLE (llvm/CMakeLists.txt), so setting LLVM_HOST_TRIPLE is sufficient even in the absence of config.guess

[hvdijk]

Thanks for suggesting this approach, I was not looking forward to having a massive CMake recreation of config.guess, this is a nice way to avoid duplicating all the detection.

llvm/cmake/modules/GetHostTriple.cmake

58

CMake if commands are special, see the warning at https://cmake.org/cmake/help/latest/command/if.html#variable-expansion.

59

When CMAKE_CXX_COMPILER is set using the CXX environment variable, and CXX contains multiple words, the remaining words are provided in CMAKE_CXX_COMPILER_ARG1 and should also be included. (Yes, despite the name, all words other than the first are stored in a single variable.) CMAKE_CXX_FLAGS may have been set from the CXXFLAGS environment variable.

Including these options can be useful when setting CXX="clang++ -m32" or CXX=clang++ CXXFLAGS=-m32 or such.

That said, this only helps when the host compiler is clang, as gcc -v's printed target is always the default target and does not get adjusted based on any -m options.

[MaskRay]

% gcc -dumpmachine
x86_64-linux-gnu
% clang -dumpmachine
x86_64-unknown-linux-gnu

llvm/cmake/modules/GetHostTriple.cmake

59

% gcc -dumpmachine
x86_64-linux-gnu
% gcc -dumpmachine -m32
x86_64-linux-gnu
% clang -dumpmachine
x86_64-unknown-linux-gnu
% clang -dumpmachine -m32
i386-unknown-linux-gnu

is probably better. If the user wants to control x86_64-linux-gnu, x86_64-unknown-linux-gnu, x86_64-pc-linux-gnu, the should specify LLVM_HOST_TRIPLE explicitly.

[MaskRay]

I have thought again: we don't even need LLVM_USE_CONFIG_GUESS. The warning can just ask the user to run sh llvm/cmake/config.guess manually and re-run cmake with -DLLVM_HOST_TRIPLE=, with a caution that the config.guess value may not be correct.

[tstellar]

Use -dumpmachine instead of -v.
Pass CXX_FLAGS to compiler along with -dumpmachine.

[tstellar]

llvm/cmake/modules/GetHostTriple.cmake

71

Ok, I think this means I need to change this from a FATAL_ERROR to a WARNING, since get_host_triple gets called even if LLVM_HOST_TRIPLE is set.

[tstellar]

In D109837#3002372, @MaskRay wrote:

I have thought again: we don't even need LLVM_USE_CONFIG_GUESS. The warning can just ask the user to run sh llvm/cmake/config.guess manually and re-run cmake with -DLLVM_HOST_TRIPLE=, with a caution that the config.guess value may not be correct.

I like this approach, but what if we took it step further and asked them to download config.guess from https://raw.githubusercontent.com/gcc-mirror/gcc/master/config.guess so that we could remove it from the llvm tree entirely?

[MaskRay]

In D109837#3002538, @tstellar wrote:

In D109837#3002372, @MaskRay wrote:

I have thought again: we don't even need LLVM_USE_CONFIG_GUESS. The warning can just ask the user to run sh llvm/cmake/config.guess manually and re-run cmake with -DLLVM_HOST_TRIPLE=, with a caution that the config.guess value may not be correct.

I like this approach, but what if we took it step further and asked them to download config.guess from https://raw.githubusercontent.com/gcc-mirror/gcc/master/config.guess so that we could remove it from the llvm tree entirely?

Sounds good!

[phosek]

In D109837#3002540, @MaskRay wrote:

In D109837#3002538, @tstellar wrote:

In D109837#3002372, @MaskRay wrote:

I have thought again: we don't even need LLVM_USE_CONFIG_GUESS. The warning can just ask the user to run sh llvm/cmake/config.guess manually and re-run cmake with -DLLVM_HOST_TRIPLE=, with a caution that the config.guess value may not be correct.

I like this approach, but what if we took it step further and asked them to download config.guess from https://raw.githubusercontent.com/gcc-mirror/gcc/master/config.guess so that we could remove it from the llvm tree entirely?

Sounds good!

We could make LLVM_USE_CONFIG_GUESS a string flag rather than a boolean option where the value would be the path to config.guess.

[hvdijk]

In D109837#3002538, @tstellar wrote:

I like this approach, but what if we took it step further and asked them to download config.guess from https://raw.githubusercontent.com/gcc-mirror/gcc/master/config.guess so that we could remove it from the llvm tree entirely?

The idea sounds good to me, but the upstream link is https://git.savannah.gnu.org/cgit/config.git/plain/config.guess. GCC updates its copy when needed for GCC, not whenever a change is made, so it can get outdated.

[tstellar]

Completely remove config.guess and add an error message with instructions
for how to download the latest config.guess and use it to generate the
default target.

[echristo]

I think I'd rather not tell people to download config.guess. We can still modify the one we have, have there been serious problems doing so?

[tstellar]

In D109837#3005394, @echristo wrote:

I think I'd rather not tell people to download config.guess. We can still modify the one we have, have there been serious problems doing so?

We could modify the one we have, but personally, I would rather see people put the fixes into CMake rather than trying to keep using this very old version of config.guess.

Do you think we should keep it as a fallback or would you be OK with removing it if we also removed the part of the error message telling people to download it?

[MaskRay]

GettingStarted mentions the supported compilers are:

Clang 3.5
Apple Clang 6.0
GCC 5.1
Visual Studio 2017

Note that the patch doesn't touch the MSVC code path. -dumpmachine works for GCC, Clang and Intel C++ Compiler, so really the downloading config.guess message will only apply to IBM XL C/C++.
Even for that, looking at powerpc64-ibm-aix above, the XL C/C++ code paths are covered.

So perhaps we can just replace elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "GNU") with unconditional -dumpmachine call and ask the user to specify LLVM_HOST_TRIPLE explicitly if -dumpmachine is somehow not available.
User not covered by -dumpmachine are expected to be able to come up the triplet by themselves.

If mentioning config.guess URL is a problem, just omit it. I don't think there will be a large loss.

---

If we want to be conservative, mention that llvm/cmake/config.guess exists; as a follow-up, delete config.guess.

Otherwise, just delete config.guess in this patch.

[tstellar]

• Remove suggestion to download config.guess
• Failur to detect triple is a warning not instead of an error.

[MaskRay]

LGTM.

[tstellar]

Make failure to determine the host via -dumpmachine a fatal error.
Empty string is not a valid value for LLVM_HOST_TRIPLE.

[tstellar]

Does anyone else have comments for this before I commit?

[echristo]

This systems seems somewhat more fragile than config.guess? I guess I'm just not convinced that doing this versus the straightforward changes to config.guess are worth our effort? Can we get an idea of what changes you don't want to make to the local copy of config.guess?

Thanks!

[tstellar]

In D109837#3016845, @echristo wrote:

This systems seems somewhat more fragile than config.guess? I guess I'm just not convinced that doing this versus the straightforward changes to config.guess are worth our effort? Can we get an idea of what changes you don't want to make to the local copy of config.guess?

Thanks!

The main feature that is missing from config.guess is the vendor detection (e.g. RedHat, OpenSuse, Ubuntu etc.), so the changes needed in config.guess to support this would be similar to what we have in clang now: https://github.com/llvm/llvm-project/blob/main/clang/lib/Driver/Distro.cpp#L97 There may be other features missing too, but this is just the one I'm interested in.

I also think that in general it would be nice to remove config.guess, because its license has caused some confusion with users and contributors.

[MaskRay]

Perhaps the description can mention the cost we'd incur if we took the "fixing config.guess" approach:

linux-musl, suse-linux, redhat-linux, and every Linux distro which customizes the 'vendor' part need to be fixed. The approach would involve poking around /etc/os-release and perhaps other random files.
As concrete examples: these are all incorrect x86_64-alpine-linux-musl, aarch64-suse-linux-gnu, powerpc64le-redhat-linux-gnu, i586-pc-haiku

The diff with the upstream version has 2000 lines FWIW :)

[echristo]

In D109837#3016868, @tstellar wrote:

In D109837#3016845, @echristo wrote:

This systems seems somewhat more fragile than config.guess? I guess I'm just not convinced that doing this versus the straightforward changes to config.guess are worth our effort? Can we get an idea of what changes you don't want to make to the local copy of config.guess?

Thanks!

The main feature that is missing from config.guess is the vendor detection (e.g. RedHat, OpenSuse, Ubuntu etc.), so the changes needed in config.guess to support this would be similar to what we have in clang now: https://github.com/llvm/llvm-project/blob/main/clang/lib/Driver/Distro.cpp#L97 There may be other features missing too, but this is just the one I'm interested in.

I also think that in general it would be nice to remove config.guess, because its license has caused some confusion with users and contributors.

That seems reasonable (and Fangrui has given a lot of context behind the scenes as well). It was mostly the long term maintainability of this versus other methods I was concerned about. icc and gxlc have compatibility modes here, though we might want to take a look and make sure that it works in general.

Otherwise, LGTM and thanks :)

-eric

llvm/cmake/modules/GetHostTriple.cmake

54–56

For debugging purposes it might be good to give the entire command line that you're trying versus just that the compiler failed?

[tstellar]

Put full -dumpmachine command in the error message.

[echristo]

Thanks! No need to wait on future approval with that change :)

-eric

[tstellar]

I've been doing a lot of testing with this patch, and one problem I've run into is that config.guess would include -gnu in the environment component of the triple, where gcc -dumpmachine does not (at least for the redhat triples e.g. x86_64-redhat-linux). There are a few places in gcc and clang that behave differently when the gnu environment is part of the triple.

I wonder if we should normalize some of the gcc style triples to include the gnu environment by default?

[tstellar]

In D109837#3034457, @tstellar wrote:

I've been doing a lot of testing with this patch, and one problem I've run into is that config.guess would include -gnu in the environment component of the triple, where gcc -dumpmachine does not (at least for the redhat triples e.g. x86_64-redhat-linux). There are a few places in gcc and clang that behave differently when the gnu environment is part of the triple.

I wonder if we should normalize some of the gcc style triples to include the gnu environment by default?

I tested this and it doesn't work. If we normalize x86_64-redhat-linux to x86_64-redhat-linux-gnu, then we don't end up picking the gcc install at /usr/lib/gcc/x86_64-redhat-linux/.

[aaronpuchert]

In D109837#3034457, @tstellar wrote:

I've been doing a lot of testing with this patch, and one problem I've run into is that config.guess would include -gnu in the environment component of the triple, where gcc -dumpmachine does not (at least for the redhat triples e.g. x86_64-redhat-linux). There are a few places in gcc and clang that behave differently when the gnu environment is part of the triple.

Same problem for SUSE. Maybe we could let Triple::Triple(const Twine &) "guess" the environment as it does for some MIPS triples? So it would take x86_64-redhat-linux but then based on the OS vendor would set Environment = Triple::GNU; at least in the case of RedHat and SUSE, and maybe some other OS vendors.

[tstellar]

In D109837#3038321, @aaronpuchert wrote:

In D109837#3034457, @tstellar wrote:

I've been doing a lot of testing with this patch, and one problem I've run into is that config.guess would include -gnu in the environment component of the triple, where gcc -dumpmachine does not (at least for the redhat triples e.g. x86_64-redhat-linux). There are a few places in gcc and clang that behave differently when the gnu environment is part of the triple.

Same problem for SUSE. Maybe we could let Triple::Triple(const Twine &) "guess" the environment as it does for some MIPS triples? So it would take x86_64-redhat-linux but then based on the OS vendor would set Environment = Triple::GNU; at least in the case of RedHat and SUSE, and maybe some other OS vendors.

Here is my proposed solution for this: D110900

[hvdijk]

In D109837#3035161, @tstellar wrote:

I tested this and it doesn't work. If we normalize x86_64-redhat-linux to x86_64-redhat-linux-gnu, then we don't end up picking the gcc install at /usr/lib/gcc/x86_64-redhat-linux/.

We actually already don't. Red Hat have a RH-specific patch for this that lets it work, it's not related to the triple handling, it's that RH prefer GCC installations that contain libgcc_s, which RH's cross-compilers don't: https://src.fedoraproject.org/rpms/clang/blob/rawhide/f/0004-PATCH-clang-Prefer-gcc-toolchains-with-libgcc_s.so-w.patch And this is suppressed under -static -static-libgcc, so to confirm that this is what causes the GCC installation to be picked that you want: after installing gcc-x86_64-linux-gnu and clang on a Fedora system, clang -v prints "Selected GCC installation: /usr/bin/../lib/gcc/x86_64-redhat-linux/11", clang -static -static-libgcc -v prints "Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/11".

So, this patch, if we modify it to normalize x86_64-redhat-linux to x86_64-redhat-linux-gnu, does not make things any worse. I am not trying to dismiss your other patches, they should still be considered, just probably not as blockers for this one.

llvm/cmake/config.guess

-#! /bin/sh
-# Attempt to guess a canonical system name.
-#   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
-#   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
-#   2011 Free Software Foundation, Inc.
-
-timestamp='2011-08-20'
-
-# This file is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
-# 02110-1301, USA.
-#
-# As a special exception to the GNU General Public License, if you
-# distribute this file as part of a program that contains a
-# configuration script generated by Autoconf, you may include it under
-# the same distribution terms that you use for the rest of that program.
-
-
-# Originally written by Per Bothner.  Please send patches (context
-# diff format) to <[e-mail]> and include a ChangeLog
-# entry.
-#
-# This script attempts to guess a canonical system name similar to
-# config.sub.  If it succeeds, it prints the system name on stdout, and
-# exits with 0.  Otherwise, it exits with 1.
-#
-# You can get the latest version of this script from:
-# http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD
-
-me=`echo "$0" | sed -e 's,.*/,,'`
-
-usage="\
-Usage: $0 [OPTION]
-
-Output the configuration name of the system \`$me' is run on.
-
-Operation modes:
-  -h, --help         print this help, then exit
-  -t, --time-stamp   print date of last modification, then exit
-  -v, --version      print version number, then exit
-
-Report bugs and patches to <[e-mail]>."
-
-version="\
-GNU config.guess ($timestamp)
-
-Originally written by Per Bothner.
-Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free
-Software Foundation, Inc.
-
-This is free software; see the source for copying conditions.  There is NO
-warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
-
-help="
-Try \`$me --help' for more information."
-
-# Parse command line
-while test $# -gt 0 ; do
-  case $1 in
-    --time-stamp | --time* | -t )
-       echo "$timestamp" ; exit ;;
-    --version | -v )
-       echo "$version" ; exit ;;
-    --help | --h* | -h )
-       echo "$usage"; exit ;;
-    -- )     # Stop option processing
-       shift; break ;;
-    - ) # Use stdin as input.
-       break ;;
-    -* )
-       echo "$me: invalid option $1$help" >&2
-       exit 1 ;;
-    * )
-       break ;;
-  esac
-done
-
-if test $# != 0; then
-  echo "$me: too many arguments$help" >&2
-  exit 1
-fi
-
-trap 'exit 1' 1 2 15
-
-# CC_FOR_BUILD -- compiler used by this script. Note that the use of a
-# compiler to aid in system detection is discouraged as it requires
-# temporary files to be created and, as you can see below, it is a
-# headache to deal with in a portable fashion.
-
-# Historically, `CC_FOR_BUILD' used to be named `HOST_CC'. We still
-# use `HOST_CC' if defined, but it is deprecated.
-
-# Portable tmp directory creation inspired by the Autoconf team.
-
-set_cc_for_build='
-trap "exitcode=\$?; (rm -f \$tmpfiles 2>/dev/null; rmdir \$tmp 2>/dev/null) && exit \$exitcode" 0 ;
-trap "rm -f \$tmpfiles 2>/dev/null; rmdir \$tmp 2>/dev/null; exit 1" 1 2 13 15 ;
-: ${TMPDIR=/tmp} ;
- { tmp=`(umask 077 && mktemp -d "$TMPDIR/cgXXXXXX") 2>/dev/null` && test -n "$tmp" && test -d "$tmp" ; } ||
- { test -n "$RANDOM" && tmp=$TMPDIR/cg$$-$RANDOM && (umask 077 && mkdir $tmp) ; } ||
- { tmp=$TMPDIR/cg-$$ && (umask 077 && mkdir $tmp) && echo "Warning: creating insecure temp directory" >&2 ; } ||
- { echo "$me: cannot create a temporary directory in $TMPDIR" >&2 ; exit 1 ; } ;
-dummy=$tmp/dummy ;
-tmpfiles="$dummy.c $dummy.o $dummy.rel $dummy" ;
-case $CC_FOR_BUILD,$HOST_CC,$CC in
- ,,)    echo "int x;" > $dummy.c ;
-  for c in cc gcc c89 c99 ; do
-    if ($c -c -o $dummy.o $dummy.c) >/dev/null 2>&1 ; then
-       CC_FOR_BUILD="$c"; break ;
-    fi ;
-  done ;
-  if test x"$CC_FOR_BUILD" = x ; then
-    CC_FOR_BUILD=no_compiler_found ;
-  fi
-  ;;
- ,,*)   CC_FOR_BUILD=$CC ;;
- ,*,*)  CC_FOR_BUILD=$HOST_CC ;;
-esac ; set_cc_for_build= ;'
-
-# This is needed to find uname on a Pyramid OSx when run in the BSD universe.
-# ([e-mail] 1994-08-24)
-if (test -f /.attbin/uname) >/dev/null 2>&1 ; then
-  PATH=$PATH:/.attbin ; export PATH
-fi
-
-UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown
-UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown
-UNAME_SYSTEM=`(uname -s) 2>/dev/null`  || UNAME_SYSTEM=unknown
-UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown
-
-# Note: order is significant - the case branches are not exclusive.
-
-case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
-    *:NetBSD:*:*)
-  # NetBSD (nbsd) targets should (where applicable) match one or
-  # more of the tupples: *-*-netbsdelf*, *-*-netbsdaout*,
-  # *-*-netbsdecoff* and *-*-netbsd*.  For targets that recently
-  # switched to ELF, *-*-netbsd* would select the old
-  # object file format.  This provides both forward
-  # compatibility and a consistent mechanism for selecting the
-  # object file format.
-  #
-  # Note: NetBSD doesn't particularly care about the vendor
-  # portion of the name.  We always set it to "unknown".
-  sysctl="sysctl -n hw.machine_arch"
-  UNAME_MACHINE_ARCH=`(/sbin/$sysctl 2>/dev/null || \
-      /usr/sbin/$sysctl 2>/dev/null || echo unknown)`
-  case "${UNAME_MACHINE_ARCH}" in
-      armeb) machine=armeb-unknown ;;
-      arm*) machine=arm-unknown ;;
-      sh3el) machine=shl-unknown ;;
-      sh3eb) machine=sh-unknown ;;
-      sh5el) machine=sh5le-unknown ;;
-      *) machine=${UNAME_MACHINE_ARCH}-unknown ;;
-  esac
-  # The Operating System including object format, if it has switched
-  # to ELF recently, or will in the future.
-  case "${UNAME_MACHINE_ARCH}" in
-      arm*|i386|m68k|ns32k|sh3*|sparc|vax)
-    eval $set_cc_for_build
-    if echo __ELF__ | $CC_FOR_BUILD -E - 2>/dev/null \
-      | grep -q __ELF__
-    then
-        # Once all utilities can be ECOFF (netbsdecoff) or a.out (netbsdaout).
-        # Return netbsd for either.  FIX?
-        os=netbsd
-    else
-        os=netbsdelf
-    fi
-    ;;
-      *)
-    os=netbsd
-    ;;
-  esac
-  # The OS release
-  # Debian GNU/NetBSD machines have a different userland, and
-  # thus, need a distinct triplet. However, they do not need
-  # kernel version information, so it can be replaced with a
-  # suitable tag, in the style of linux-gnu.
-  case "${UNAME_VERSION}" in
-      Debian*)
-    release='-gnu'
-    ;;
-      *)
-    release=`echo ${UNAME_RELEASE}|sed -e 's/[-_].*/\./'`
-    ;;
-  esac
-  # Since CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM:
-  # contains redundant information, the shorter form:
-  # CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM is used.
-  echo "${machine}-${os}${release}"
-  exit ;;
-    *:OpenBSD:*:*)
-  UNAME_MACHINE_ARCH=`arch | sed 's/OpenBSD.//'`
-  echo ${UNAME_MACHINE_ARCH}-unknown-openbsd${UNAME_RELEASE}
-  exit ;;
-    *:ekkoBSD:*:*)
-  echo ${UNAME_MACHINE}-unknown-ekkobsd${UNAME_RELEASE}
-  exit ;;
-    *:SolidBSD:*:*)
-  echo ${UNAME_MACHINE}-unknown-solidbsd${UNAME_RELEASE}
-  exit ;;
-    macppc:MirBSD:*:*)
-  echo powerpc-unknown-mirbsd${UNAME_RELEASE}
-  exit ;;
-    *:MirBSD:*:*)
-  echo ${UNAME_MACHINE}-unknown-mirbsd${UNAME_RELEASE}
-  exit ;;
-    alpha:OSF1:*:*)
-  case $UNAME_RELEASE in
-  *4.0)
-    UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $3}'`
-    ;;
-  *5.*)
-    UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $4}'`
-    ;;
-  esac
-  # According to Compaq, /usr/sbin/psrinfo has been available on
-  # OSF/1 and Tru64 systems produced since 1995.  I hope that
-  # covers most systems running today.  This code pipes the CPU
-  # types through head -n 1, so we only detect the type of CPU 0.
-  ALPHA_CPU_TYPE=`/usr/sbin/psrinfo -v | sed -n -e 's/^  The alpha \(.*\) processor.*$/\1/p' | head -n 1`
-  case "$ALPHA_CPU_TYPE" in
-      "EV4 (21064)")
-    UNAME_MACHINE="alpha" ;;
-      "EV4.5 (21064)")
-    UNAME_MACHINE="alpha" ;;
-      "LCA4 (21066/21068)")
-    UNAME_MACHINE="alpha" ;;
-      "EV5 (21164)")
-    UNAME_MACHINE="alphaev5" ;;
-      "EV5.6 (21164A)")
-    UNAME_MACHINE="alphaev56" ;;
-      "EV5.6 (21164PC)")
-    UNAME_MACHINE="alphapca56" ;;
-      "EV5.7 (21164PC)")
-    UNAME_MACHINE="alphapca57" ;;
-      "EV6 (21264)")
-    UNAME_MACHINE="alphaev6" ;;
-      "EV6.7 (21264A)")
-    UNAME_MACHINE="alphaev67" ;;
-      "EV6.8CB (21264C)")
-    UNAME_MACHINE="alphaev68" ;;
-      "EV6.8AL (21264B)")
-    UNAME_MACHINE="alphaev68" ;;
-      "EV6.8CX (21264D)")
-    UNAME_MACHINE="alphaev68" ;;
-      "EV6.9A (21264/EV69A)")
-    UNAME_MACHINE="alphaev69" ;;
-      "EV7 (21364)")
-    UNAME_MACHINE="alphaev7" ;;
-      "EV7.9 (21364A)")
-    UNAME_MACHINE="alphaev79" ;;
-  esac
-  # A Pn.n version is a patched version.
-  # A Vn.n version is a released version.
-  # A Tn.n version is a released field test version.
-  # A Xn.n version is an unreleased experimental baselevel.
-  # 1.2 uses "1.2" for uname -r.
-  echo ${UNAME_MACHINE}-dec-osf`echo ${UNAME_RELEASE} | sed -e 's/^[PVTX]//' | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
-  # Reset EXIT trap before exiting to avoid spurious non-zero exit code.
-  exitcode=$?
-  trap '' 0
-  exit $exitcode ;;
-    Alpha\ *:Windows_NT*:*)
-  # How do we know it's Interix rather than the generic POSIX subsystem?
-  # Should we change UNAME_MACHINE based on the output of uname instead
-  # of the specific Alpha model?
-  echo alpha-pc-interix
-  exit ;;
-    21064:Windows_NT:50:3)
-  echo alpha-dec-winnt3.5
-  exit ;;
-    Amiga*:UNIX_System_V:4.0:*)
-  echo m68k-unknown-sysv4
-  exit ;;
-    *:[Aa]miga[Oo][Ss]:*:*)
-  echo ${UNAME_MACHINE}-unknown-amigaos
-  exit ;;
-    *:[Mm]orph[Oo][Ss]:*:*)
-  echo ${UNAME_MACHINE}-unknown-morphos
-  exit ;;
-    *:OS/390:*:*)
-  echo i370-ibm-openedition
-  exit ;;
-    *:z/VM:*:*)
-  echo s390-ibm-zvmoe
-  exit ;;
-    *:OS400:*:*)
-  echo powerpc-ibm-os400
-  exit ;;
-    arm:RISC*:1.[012]*:*|arm:riscix:1.[012]*:*)
-  echo arm-acorn-riscix${UNAME_RELEASE}
-  exit ;;
-    arm:riscos:*:*|arm:RISCOS:*:*)
-  echo arm-unknown-riscos
-  exit ;;
-    SR2?01:HI-UX/MPP:*:* | SR8000:HI-UX/MPP:*:*)
-  echo hppa1.1-hitachi-hiuxmpp
-  exit ;;
-    Pyramid*:OSx*:*:* | MIS*:OSx*:*:* | MIS*:SMP_DC-OSx*:*:*)
-  # [e-mail] (Earle F. Ake) contributed MIS and NILE.
-  if test "`(/bin/universe) 2>/dev/null`" = att ; then
-    echo pyramid-pyramid-sysv3
-  else
-    echo pyramid-pyramid-bsd
-  fi
-  exit ;;
-    NILE*:*:*:dcosx)
-  echo pyramid-pyramid-svr4
-  exit ;;
-    DRS?6000:unix:4.0:6*)
-  echo sparc-icl-nx6
-  exit ;;
-    DRS?6000:UNIX_SV:4.2*:7* | DRS?6000:isis:4.2*:7*)
-  case `/usr/bin/uname -p` in
-      sparc) echo sparc-icl-nx7; exit ;;
-  esac ;;
-    s390x:SunOS:*:*)
-  echo ${UNAME_MACHINE}-ibm-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
-  exit ;;
-    sun4H:SunOS:5.*:*)
-  echo sparc-hal-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
-  exit ;;
-    sun4*:SunOS:5.*:* | tadpole*:SunOS:5.*:*)
-  echo sparc-sun-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
-  exit ;;
-    i86pc:AuroraUX:5.*:* | i86xen:AuroraUX:5.*:*)
-  echo i386-pc-auroraux${UNAME_RELEASE}
-  exit ;;
-    i86pc:SunOS:5.*:* | i86xen:SunOS:5.*:*)
-  eval $set_cc_for_build
-  SUN_ARCH="i386"
-  # If there is a compiler, see if it is configured for 64-bit objects.
-  # Note that the Sun cc does not turn __LP64__ into 1 like gcc does.
-  # This test works for both compilers.
-  if [ "$CC_FOR_BUILD" != 'no_compiler_found' ]; then
-      if (echo '#ifdef __amd64'; echo IS_64BIT_ARCH; echo '#endif') | \
-    (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \
-    grep IS_64BIT_ARCH >/dev/null
-      then
-    SUN_ARCH="x86_64"
-      fi
-  fi
-  echo ${SUN_ARCH}-pc-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
-  exit ;;
-    sun4*:SunOS:6*:*)
-  # According to config.sub, this is the proper way to canonicalize
-  # SunOS6.  Hard to guess exactly what SunOS6 will be like, but
-  # it's likely to be more like Solaris than SunOS4.
-  echo sparc-sun-solaris3`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
-  exit ;;
-    sun4*:SunOS:*:*)
-  case "`/usr/bin/arch -k`" in
-      Series*|S4*)
-    UNAME_RELEASE=`uname -v`
-    ;;
-  esac
-  # Japanese Language versions have a version number like `4.1.3-JL'.
-  echo sparc-sun-sunos`echo ${UNAME_RELEASE}|sed -e 's/-/_/'`
-  exit ;;
-    sun3*:SunOS:*:*)
-  echo m68k-sun-sunos${UNAME_RELEASE}
-  exit ;;
-    sun*:*:4.2BSD:*)
-  UNAME_RELEASE=`(sed 1q /etc/motd | awk '{print substr($5,1,3)}') 2>/dev/null`
-  test "x${UNAME_RELEASE}" = "x" && UNAME_RELEASE=3
-  case "`/bin/arch`" in
-      sun3)
-    echo m68k-sun-sunos${UNAME_RELEASE}
-    ;;
-      sun4)
-    echo sparc-sun-sunos${UNAME_RELEASE}
-    ;;
-  esac
-  exit ;;
-    aushp:SunOS:*:*)
-  echo sparc-auspex-sunos${UNAME_RELEASE}
-  exit ;;
-    # The situation for MiNT is a little confusing.  The machine name
-    # can be virtually everything (everything which is not
-    # "atarist" or "atariste" at least should have a processor
-    # > m68000).  The system name ranges from "MiNT" over "FreeMiNT"
-    # to the lowercase version "mint" (or "freemint").  Finally
-    # the system name "TOS" denotes a system which is actually not
-    # MiNT.  But MiNT is downward compatible to TOS, so this should
-    # be no problem.
-    atarist[e]:*MiNT:*:* | atarist[e]:*mint:*:* | atarist[e]:*TOS:*:*)
-  echo m68k-atari-mint${UNAME_RELEASE}
-  exit ;;
-    atari*:*MiNT:*:* | atari*:*mint:*:* | atarist[e]:*TOS:*:*)
-  echo m68k-atari-mint${UNAME_RELEASE}
-  exit ;;
-    *falcon*:*MiNT:*:* | *falcon*:*mint:*:* | *falcon*:*TOS:*:*)
-  echo m68k-atari-mint${UNAME_RELEASE}
-  exit ;;
-    milan*:*MiNT:*:* | milan*:*mint:*:* | *milan*:*TOS:*:*)
-  echo m68k-milan-mint${UNAME_RELEASE}
-  exit ;;
-    hades*:*MiNT:*:* | hades*:*mint:*:* | *hades*:*TOS:*:*)
-  echo m68k-hades-mint${UNAME_RELEASE}
-  exit ;;
-    *:*MiNT:*:* | *:*mint:*:* | *:*TOS:*:*)
-  echo m68k-unknown-mint${UNAME_RELEASE}
-  exit ;;
-    m68k:machten:*:*)
-  echo m68k-apple-machten${UNAME_RELEASE}
-  exit ;;
-    powerpc:machten:*:*)
-  echo powerpc-apple-machten${UNAME_RELEASE}
-  exit ;;
-    RISC*:Mach:*:*)
-  echo mips-dec-mach_bsd4.3
-  exit ;;
-    RISC*:ULTRIX:*:*)
-  echo mips-dec-ultrix${UNAME_RELEASE}
-  exit ;;
-    VAX*:ULTRIX*:*:*)
-  echo vax-dec-ultrix${UNAME_RELEASE}
-  exit ;;
-    2020:CLIX:*:* | 2430:CLIX:*:*)
-  echo clipper-intergraph-clix${UNAME_RELEASE}
-  exit ;;
-    mips:*:*:UMIPS | mips:*:*:RISCos)
-  eval $set_cc_for_build
-  sed 's/^ //' << EOF >$dummy.c
-#ifdef __cplusplus
-#include <stdio.h>  /* for printf() prototype */
-  int main (int argc, char *argv[]) {
-#else
-  int main (argc, argv) int argc; char *argv[]; {
-#endif
-  #if defined (host_mips) && defined (MIPSEB)
-  #if defined (SYSTYPE_SYSV)
-    printf ("mips-mips-riscos%ssysv\n", argv[1]); exit (0);
-  #endif
-  #if defined (SYSTYPE_SVR4)
-    printf ("mips-mips-riscos%ssvr4\n", argv[1]); exit (0);
-  #endif
-  #if defined (SYSTYPE_BSD43) || defined(SYSTYPE_BSD)
-    printf ("mips-mips-riscos%sbsd\n", argv[1]); exit (0);
-  #endif
-  #endif
-    exit (-1);
-  }
-EOF
-  $CC_FOR_BUILD -o $dummy $dummy.c &&
-    dummyarg=`echo "${UNAME_RELEASE}" | sed -n 's/\([0-9]*\).*/\1/p'` &&
-    SYSTEM_NAME=`$dummy $dummyarg` &&
-      { echo "$SYSTEM_NAME"; exit; }
-  echo mips-mips-riscos${UNAME_RELEASE}
-  exit ;;
-    Motorola:PowerMAX_OS:*:*)
-  echo powerpc-motorola-powermax
-  exit ;;
-    Motorola:*:4.3:PL8-*)
-  echo powerpc-harris-powermax
-  exit ;;
-    Night_Hawk:*:*:PowerMAX_OS | Synergy:PowerMAX_OS:*:*)
-  echo powerpc-harris-powermax
-  exit ;;
-    Night_Hawk:Power_UNIX:*:*)
-  echo powerpc-harris-powerunix
-  exit ;;
-    m88k:CX/UX:7*:*)
-  echo m88k-harris-cxux7
-  exit ;;
-    m88k:*:4*:R4*)
-  echo m88k-motorola-sysv4
-  exit ;;
-    m88k:*:3*:R3*)
-  echo m88k-motorola-sysv3
-  exit ;;
-    AViiON:dgux:*:*)
-  # DG/UX returns AViiON for all architectures
-  UNAME_PROCESSOR=`/usr/bin/uname -p`
-  if [ $UNAME_PROCESSOR = mc88100 ] || [ $UNAME_PROCESSOR = mc88110 ]
-  then
-      if [ ${TARGET_BINARY_INTERFACE}x = m88kdguxelfx ] || \
-         [ ${TARGET_BINARY_INTERFACE}x = x ]
-      then
-    echo m88k-dg-dgux${UNAME_RELEASE}
-      else
-    echo m88k-dg-dguxbcs${UNAME_RELEASE}
-      fi
-  else
-      echo i586-dg-dgux${UNAME_RELEASE}
-  fi
-  exit ;;
-    M88*:DolphinOS:*:*) # DolphinOS (SVR3)
-  echo m88k-dolphin-sysv3
-  exit ;;
-    M88*:*:R3*:*)
-  # Delta 88k system running SVR3
-  echo m88k-motorola-sysv3
-  exit ;;
-    XD88*:*:*:*) # Tektronix XD88 system running UTekV (SVR3)
-  echo m88k-tektronix-sysv3
-  exit ;;
-    Tek43[0-9][0-9]:UTek:*:*) # Tektronix 4300 system running UTek (BSD)
-  echo m68k-tektronix-bsd
-  exit ;;
-    *:IRIX*:*:*)
-  echo mips-sgi-irix`echo ${UNAME_RELEASE}|sed -e 's/-/_/g'`
-  exit ;;
-    ????????:AIX?:[12].1:2)   # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX.
-  echo romp-ibm-aix     # uname -m gives an 8 hex-code CPU id
-  exit ;;               # Note that: echo "'`uname -s`'" gives 'AIX '
-    i*86:AIX:*:*)
-  echo i386-ibm-aix
-  exit ;;
-    ia64:AIX:*:*)
-  if [ -x /usr/bin/oslevel ] ; then
-    IBM_REV=`/usr/bin/oslevel`
-  else
-    IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE}
-  fi
-  echo ${UNAME_MACHINE}-ibm-aix${IBM_REV}
-  exit ;;
-    *:AIX:2:3)
-  if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then
-    eval $set_cc_for_build
-    sed 's/^   //' << EOF >$dummy.c
-    #include <sys/systemcfg.h>
-
-    main()
-      {
-      if (!__power_pc())
-        exit(1);
-      puts("powerpc-ibm-aix3.2.5");
-      exit(0);
-      }
-EOF
-    if $CC_FOR_BUILD -o $dummy $dummy.c && SYSTEM_NAME=`$dummy`
-    then
-      echo "$SYSTEM_NAME"
-    else
-      echo rs6000-ibm-aix3.2.5
-    fi
-  elif grep bos324 /usr/include/stdio.h >/dev/null 2>&1; then
-    echo rs6000-ibm-aix3.2.4
-  else
-    echo rs6000-ibm-aix3.2
-  fi
-  exit ;;
-    *:AIX:*:[4567])
-  IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | sed 1q | awk '{ print $1 }'`
-  if /usr/sbin/lsattr -El ${IBM_CPU_ID} | grep ' POWER' >/dev/null 2>&1; then
-    IBM_ARCH=rs6000
-  else
-    IBM_ARCH=powerpc
-  fi
-  if [ -x /usr/bin/oslevel ] ; then
-    IBM_REV=`/usr/bin/oslevel`
-  else
-    IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE}
-  fi
-  echo ${IBM_ARCH}-ibm-aix${IBM_REV}
-  exit ;;
-    *:AIX:*:*)
-  echo rs6000-ibm-aix
-  exit ;;
-    ibmrt:4.4BSD:*|romp-ibm:BSD:*)
-  echo romp-ibm-bsd4.4
-  exit ;;
-    ibmrt:*BSD:*|romp-ibm:BSD:*)            # covers RT/PC BSD and
-  echo romp-ibm-bsd${UNAME_RELEASE}   # 4.3 with uname added to
-  exit ;;                             # report: romp-ibm BSD 4.3
-    *:BOSX:*:*)
-  echo rs6000-bull-bosx
-  exit ;;
-    DPX/2?00:B.O.S.:*:*)
-  echo m68k-bull-sysv3
-  exit ;;
-    9000/[34]??:4.3bsd:1.*:*)
-  echo m68k-hp-bsd
-  exit ;;
-    hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*)
-  echo m68k-hp-bsd4.4
-  exit ;;
-    9000/[34678]??:HP-UX:*:*)
-  HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'`
-  case "${UNAME_MACHINE}" in
-      9000/31? )            HP_ARCH=m68000 ;;
-      9000/[34]?? )         HP_ARCH=m68k ;;
-      9000/[678][0-9][0-9])
-    if [ -x /usr/bin/getconf ]; then
-        sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null`
-        sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null`
-        case "${sc_cpu_version}" in
-          523) HP_ARCH="hppa1.0" ;; # CPU_PA_RISC1_0
-          528) HP_ARCH="hppa1.1" ;; # CPU_PA_RISC1_1
-          532)                      # CPU_PA_RISC2_0
-      case "${sc_kernel_bits}" in
-        32) HP_ARCH="hppa2.0n" ;;
-        64) HP_ARCH="hppa2.0w" ;;
-        '') HP_ARCH="hppa2.0" ;;   # HP-UX 10.20
-      esac ;;
-        esac
-    fi
-    if [ "${HP_ARCH}" = "" ]; then
-        eval $set_cc_for_build
-        sed 's/^   //' << EOF >$dummy.c
-
-    #define _HPUX_SOURCE
-    #include <stdlib.h>
-    #include <unistd.h>
-
-    int main ()
-    {
-    #if defined(_SC_KERNEL_BITS)
-        long bits = sysconf(_SC_KERNEL_BITS);
-    #endif
-        long cpu  = sysconf (_SC_CPU_VERSION);
-
-        switch (cpu)
-      {
-      case CPU_PA_RISC1_0: puts ("hppa1.0"); break;
-      case CPU_PA_RISC1_1: puts ("hppa1.1"); break;
-      case CPU_PA_RISC2_0:
-    #if defined(_SC_KERNEL_BITS)
-          switch (bits)
-        {
-        case 64: puts ("hppa2.0w"); break;
-        case 32: puts ("hppa2.0n"); break;
-        default: puts ("hppa2.0"); break;
-        } break;
-    #else  /* !defined(_SC_KERNEL_BITS) */
-          puts ("hppa2.0"); break;
-    #endif
-      default: puts ("hppa1.0"); break;
-      }
-        exit (0);
-    }
-EOF
-        (CCOPTS= $CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null) && HP_ARCH=`$dummy`
-        test -z "$HP_ARCH" && HP_ARCH=hppa
-    fi ;;
-  esac
-  if [ ${HP_ARCH} = "hppa2.0w" ]
-  then
-      eval $set_cc_for_build
-
-      # hppa2.0w-hp-hpux* has a 64-bit kernel and a compiler generating
-      # 32-bit code.  hppa64-hp-hpux* has the same kernel and a compiler
-      # generating 64-bit code.  GNU and HP use different nomenclature:
-      #
-      # $ CC_FOR_BUILD=cc ./config.guess
-      # => hppa2.0w-hp-hpux11.23
-      # $ CC_FOR_BUILD="cc +DA2.0w" ./config.guess
-      # => hppa64-hp-hpux11.23
-
-      if echo __LP64__ | (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) |
-    grep -q __LP64__
-      then
-    HP_ARCH="hppa2.0w"
-      else
-    HP_ARCH="hppa64"
-      fi
-  fi
-  echo ${HP_ARCH}-hp-hpux${HPUX_REV}
-  exit ;;
-    ia64:HP-UX:*:*)
-  HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'`
-  echo ia64-hp-hpux${HPUX_REV}
-  exit ;;
-    3050*:HI-UX:*:*)
-  eval $set_cc_for_build
-  sed 's/^ //' << EOF >$dummy.c
-  #include <unistd.h>
-  int
-  main ()
-  {
-    long cpu = sysconf (_SC_CPU_VERSION);
-    /* The order matters, because CPU_IS_HP_MC68K erroneously returns
-       true for CPU_PA_RISC1_0.  CPU_IS_PA_RISC returns correct
-       results, however.  */
-    if (CPU_IS_PA_RISC (cpu))
-      {
-        switch (cpu)
-    {
-      case CPU_PA_RISC1_0: puts ("hppa1.0-hitachi-hiuxwe2"); break;
-      case CPU_PA_RISC1_1: puts ("hppa1.1-hitachi-hiuxwe2"); break;
-      case CPU_PA_RISC2_0: puts ("hppa2.0-hitachi-hiuxwe2"); break;
-      default: puts ("hppa-hitachi-hiuxwe2"); break;
-    }
-      }
-    else if (CPU_IS_HP_MC68K (cpu))
-      puts ("m68k-hitachi-hiuxwe2");
-    else puts ("unknown-hitachi-hiuxwe2");
-    exit (0);
-  }
-EOF
-  $CC_FOR_BUILD -o $dummy $dummy.c && SYSTEM_NAME=`$dummy` &&
-    { echo "$SYSTEM_NAME"; exit; }
-  echo unknown-hitachi-hiuxwe2
-  exit ;;
-    9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:* )
-  echo hppa1.1-hp-bsd
-  exit ;;
-    9000/8??:4.3bsd:*:*)
-  echo hppa1.0-hp-bsd
-  exit ;;
-    *9??*:MPE/iX:*:* | *3000*:MPE/iX:*:*)
-  echo hppa1.0-hp-mpeix
-  exit ;;
-    hp7??:OSF1:*:* | hp8?[79]:OSF1:*:* )
-  echo hppa1.1-hp-osf
-  exit ;;
-    hp8??:OSF1:*:*)
-  echo hppa1.0-hp-osf
-  exit ;;
-    i*86:OSF1:*:*)
-  if [ -x /usr/sbin/sysversion ] ; then
-      echo ${UNAME_MACHINE}-unknown-osf1mk
-  else
-      echo ${UNAME_MACHINE}-unknown-osf1
-  fi
-  exit ;;
-    parisc*:Lites*:*:*)
-  echo hppa1.1-hp-lites
-  exit ;;
-    C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*)
-  echo c1-convex-bsd
-  exit ;;
-    C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*)
-  if getsysinfo -f scalar_acc
-  then echo c32-convex-bsd
-  else echo c2-convex-bsd
-  fi
-  exit ;;
-    C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*)
-  echo c34-convex-bsd
-  exit ;;
-    C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*)
-  echo c38-convex-bsd
-  exit ;;
-    C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*)
-  echo c4-convex-bsd
-  exit ;;
-    CRAY*Y-MP:*:*:*)
-  echo ymp-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
-  exit ;;
-    CRAY*[A-Z]90:*:*:*)
-  echo ${UNAME_MACHINE}-cray-unicos${UNAME_RELEASE} \
-  | sed -e 's/CRAY.*\([A-Z]90\)/\1/' \
-        -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/ \
-        -e 's/\.[^.]*$/.X/'
-  exit ;;
-    CRAY*TS:*:*:*)
-  echo t90-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
-  exit ;;
-    CRAY*T3E:*:*:*)
-  echo alphaev5-cray-unicosmk${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
-  exit ;;
-    CRAY*SV1:*:*:*)
-  echo sv1-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
-  exit ;;
-    *:UNICOS/mp:*:*)
-  echo craynv-cray-unicosmp${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
-  exit ;;
-    F30[01]:UNIX_System_V:*:* | F700:UNIX_System_V:*:*)
-  FUJITSU_PROC=`uname -m | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
-  FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'`
-  FUJITSU_REL=`echo ${UNAME_RELEASE} | sed -e 's/ /_/'`
-  echo "${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}"
-  exit ;;
-    5000:UNIX_System_V:4.*:*)
-  FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'`
-  FUJITSU_REL=`echo ${UNAME_RELEASE} | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/ /_/'`
-  echo "sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}"
-  exit ;;
-    i*86:BSD/386:*:* | i*86:BSD/OS:*:* | *:Ascend\ Embedded/OS:*:*)
-  echo ${UNAME_MACHINE}-pc-bsdi${UNAME_RELEASE}
-  exit ;;
-    sparc*:BSD/OS:*:*)
-  echo sparc-unknown-bsdi${UNAME_RELEASE}
-  exit ;;
-    *:BSD/OS:*:*)
-  echo ${UNAME_MACHINE}-unknown-bsdi${UNAME_RELEASE}
-  exit ;;
-    *:FreeBSD:*:*)
-  UNAME_PROCESSOR=`/usr/bin/uname -p`
-  case ${UNAME_PROCESSOR} in
-      amd64)
-    echo x86_64-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;;
-      *)
-    echo ${UNAME_PROCESSOR}-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;;
-  esac
-  exit ;;
-    i*:CYGWIN*:*)
-  echo ${UNAME_MACHINE}-pc-cygwin
-  exit ;;
-    *:MINGW*:*)
-  echo ${UNAME_MACHINE}-pc-mingw32
-  exit ;;
-    *:MSYS*:*)
-  echo ${UNAME_MACHINE}-pc-msys
-  exit ;;
-    i*:windows32*:*)
-  # uname -m includes "-pc" on this system.
-  echo ${UNAME_MACHINE}-mingw32
-  exit ;;
-    i*:PW*:*)
-  echo ${UNAME_MACHINE}-pc-pw32
-  exit ;;
-    *:Interix*:*)
-  case ${UNAME_MACHINE} in
-      x86)
-    echo i586-pc-interix${UNAME_RELEASE}
-    exit ;;
-      authenticamd | genuineintel | EM64T)
-    echo x86_64-unknown-interix${UNAME_RELEASE}
-    exit ;;
-      IA64)
-    echo ia64-unknown-interix${UNAME_RELEASE}
-    exit ;;
-  esac ;;
-    [345]86:Windows_95:* | [345]86:Windows_98:* | [345]86:Windows_NT:*)
-  echo i${UNAME_MACHINE}-pc-mks
-  exit ;;
-    8664:Windows_NT:*)
-  echo x86_64-pc-mks
-  exit ;;
-    i*:Windows_NT*:* | Pentium*:Windows_NT*:*)
-  # How do we know it's Interix rather than the generic POSIX subsystem?
-  # It also conflicts with pre-2.0 versions of AT&T UWIN. Should we
-  # UNAME_MACHINE based on the output of uname instead of i386?
-  echo i586-pc-interix
-  exit ;;
-    i*:UWIN*:*)
-  echo ${UNAME_MACHINE}-pc-uwin
-  exit ;;
-    amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*)
-  echo x86_64-unknown-cygwin
-  exit ;;
-    p*:CYGWIN*:*)
-  echo powerpcle-unknown-cygwin
-  exit ;;
-    prep*:SunOS:5.*:*)
-  echo powerpcle-unknown-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
-  exit ;;
-    *:GNU:*:*)
-  # the GNU system
-  echo `echo ${UNAME_MACHINE}|sed -e 's,[-/].*$,,'`-unknown-gnu`echo ${UNAME_RELEASE}|sed -e 's,/.*$,,'`
-  exit ;;
-    *:GNU/*:*:*)
-  # other systems with GNU libc and userland
-  echo ${UNAME_MACHINE}-unknown-`echo ${UNAME_SYSTEM} | sed 's,^[^/]*/,,' | tr '[A-Z]' '[a-z]'``echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`-gnu
-  exit ;;
-    i*86:Minix:*:*)
-  echo ${UNAME_MACHINE}-pc-minix
-  exit ;;
-    aarch64*:Linux:*)
-      echo ${UNAME_MACHINE}-unknown-linux-gnu
-  exit ;;
-    alpha:Linux:*:*)
-  case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in
-    EV5)   UNAME_MACHINE=alphaev5 ;;
-    EV56)  UNAME_MACHINE=alphaev56 ;;
-    PCA56) UNAME_MACHINE=alphapca56 ;;
-    PCA57) UNAME_MACHINE=alphapca56 ;;
-    EV6)   UNAME_MACHINE=alphaev6 ;;
-    EV67)  UNAME_MACHINE=alphaev67 ;;
-    EV68*) UNAME_MACHINE=alphaev68 ;;
-  esac
-  objdump --private-headers /bin/sh | grep -q ld.so.1
-  if test "$?" = 0 ; then LIBC="libc1" ; else LIBC="" ; fi
-  echo ${UNAME_MACHINE}-unknown-linux-gnu${LIBC}
-  exit ;;
-    arm*:Linux:*:*)
-  eval $set_cc_for_build
-  if echo __ARM_EABI__ | $CC_FOR_BUILD -E - 2>/dev/null \
-      | grep -q __ARM_EABI__
-  then
-      echo ${UNAME_MACHINE}-unknown-linux-gnu
-  else
-      if echo __ARM_PCS_VFP | $CC_FOR_BUILD -E - 2>/dev/null \
-    | grep -q __ARM_PCS_VFP
-      then
-    echo ${UNAME_MACHINE}-unknown-linux-gnueabi
-      else
-    echo ${UNAME_MACHINE}-unknown-linux-gnueabihf
-      fi
-  fi
-  exit ;;
-    avr32*:Linux:*:*)
-  echo ${UNAME_MACHINE}-unknown-linux-gnu
-  exit ;;
-    cris:Linux:*:*)
-  echo cris-axis-linux-gnu
-  exit ;;
-    crisv32:Linux:*:*)
-  echo crisv32-axis-linux-gnu
-  exit ;;
-    frv:Linux:*:*)
-  echo frv-unknown-linux-gnu
-  exit ;;
-    i*86:Linux:*:*)
-  LIBC=gnu
-  eval $set_cc_for_build
-  sed 's/^ //' << EOF >$dummy.c
-  #ifdef __dietlibc__
-  LIBC=dietlibc
-  #endif
-EOF
-  eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^LIBC'`
-  echo "${UNAME_MACHINE}-pc-linux-${LIBC}"
-  exit ;;
-    ia64:Linux:*:*)
-  echo ${UNAME_MACHINE}-unknown-linux-gnu
-  exit ;;
-    m32r*:Linux:*:*)
-  echo ${UNAME_MACHINE}-unknown-linux-gnu
-  exit ;;
-    m68*:Linux:*:*)
-  echo ${UNAME_MACHINE}-unknown-linux-gnu
-  exit ;;
-    mips:Linux:*:* | mips64:Linux:*:*)
-  eval $set_cc_for_build
-  sed 's/^ //' << EOF >$dummy.c
-  #undef CPU
-  #undef ${UNAME_MACHINE}
-  #undef ${UNAME_MACHINE}el
-  #if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL)
-  CPU=${UNAME_MACHINE}el
-  #else
-  #if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB)
-  CPU=${UNAME_MACHINE}
-  #else
-  CPU=
-  #endif
-  #endif
-EOF
-  eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^CPU'`
-  test x"${CPU}" != x && { echo "${CPU}-unknown-linux-gnu"; exit; }
-  ;;
-    or32:Linux:*:*)
-  echo or32-unknown-linux-gnu
-  exit ;;
-    padre:Linux:*:*)
-  echo sparc-unknown-linux-gnu
-  exit ;;
-    parisc64:Linux:*:* | hppa64:Linux:*:*)
-  echo hppa64-unknown-linux-gnu
-  exit ;;
-    parisc:Linux:*:* | hppa:Linux:*:*)
-  # Look for CPU level
-  case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in
-    PA7*) echo hppa1.1-unknown-linux-gnu ;;
-    PA8*) echo hppa2.0-unknown-linux-gnu ;;
-    *)    echo hppa-unknown-linux-gnu ;;
-  esac
-  exit ;;
-    ppc64:Linux:*:*)
-  echo powerpc64-unknown-linux-gnu
-  exit ;;
-    ppc64le:Linux:*:*)
-  echo powerpc64le-unknown-linux-gnu
-  exit ;;
-    ppc:Linux:*:*)
-  echo powerpc-unknown-linux-gnu
-  exit ;;
-    ppcle:Linux:*:*)
-  echo powerpcle-unknown-linux-gnu
-  exit ;;
-    riscv32:Linux:*:* | riscv64:Linux:*:*)
-  LIBC=gnu
-  eval $set_cc_for_build
-  # Do not check for __GLIBC__ because uclibc defines it too
-  sed 's/^ //' << EOF >$dummy.c
-  #include <features.h>
-  #if defined(__UCLIBC__)
-  LIBC=uclibc
-  #elif defined(__dietlibc__)
-  LIBC=dietlibc
-  #endif
-EOF
-  eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^LIBC'`
-
-  # There is no features test macro for musl
-  # Follow the GNU's config.guess approach of
-  # checking the output of ldd
-  if command -v ldd >/dev/null && \
-    ldd --version 2>&1 | grep -q ^musl; then
-      LIBC=musl
-  fi
-
-  echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-  exit ;;
-    s390:Linux:*:* | s390x:Linux:*:*)
-  echo ${UNAME_MACHINE}-ibm-linux
-  exit ;;
-    sh64*:Linux:*:*)
-  echo ${UNAME_MACHINE}-unknown-linux-gnu
-  exit ;;
-    sh*:Linux:*:*)
-  echo ${UNAME_MACHINE}-unknown-linux-gnu
-  exit ;;
-    sparc:Linux:*:* | sparc64:Linux:*:*)
-  echo ${UNAME_MACHINE}-unknown-linux-gnu
-  exit ;;
-    tile*:Linux:*:*)
-  echo ${UNAME_MACHINE}-unknown-linux-gnu
-  exit ;;
-    vax:Linux:*:*)
-  echo ${UNAME_MACHINE}-dec-linux-gnu
-  exit ;;
-    x86_64:Linux:*:*)
-  echo x86_64-unknown-linux-gnu
-  exit ;;
-    xtensa*:Linux:*:*)
-  echo ${UNAME_MACHINE}-unknown-linux-gnu
-  exit ;;
-    i*86:DYNIX/ptx:4*:*)
-  # ptx 4.0 does uname -s correctly, with DYNIX/ptx in there.
-  # earlier versions are messed up and put the nodename in both
-  # sysname and nodename.
-  echo i386-sequent-sysv4
-  exit ;;
-    i*86:UNIX_SV:4.2MP:2.*)
-  # Unixware is an offshoot of SVR4, but it has its own version
-  # number series starting with 2...
-  # I am not positive that other SVR4 systems won't match this,
-  # I just have to hope.  -- rms.
-  # Use sysv4.2uw... so that sysv4* matches it.
-  echo ${UNAME_MACHINE}-pc-sysv4.2uw${UNAME_VERSION}
-  exit ;;
-    i*86:OS/2:*:*)
-  # If we were able to find `uname', then EMX Unix compatibility
-  # is probably installed.
-  echo ${UNAME_MACHINE}-pc-os2-emx
-  exit ;;
-    i*86:XTS-300:*:STOP)
-  echo ${UNAME_MACHINE}-unknown-stop
-  exit ;;
-    i*86:atheos:*:*)
-  echo ${UNAME_MACHINE}-unknown-atheos
-  exit ;;
-    i*86:syllable:*:*)
-  echo ${UNAME_MACHINE}-pc-syllable
-  exit ;;
-    i*86:LynxOS:2.*:* | i*86:LynxOS:3.[01]*:* | i*86:LynxOS:4.[02]*:*)
-  echo i386-unknown-lynxos${UNAME_RELEASE}
-  exit ;;
-    i*86:*DOS:*:*)
-  echo ${UNAME_MACHINE}-pc-msdosdjgpp
-  exit ;;
-    i*86:*:4.*:* | i*86:SYSTEM_V:4.*:*)
-  UNAME_REL=`echo ${UNAME_RELEASE} | sed 's/\/MP$//'`
-  if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then
-    echo ${UNAME_MACHINE}-univel-sysv${UNAME_REL}
-  else
-    echo ${UNAME_MACHINE}-pc-sysv${UNAME_REL}
-  fi
-  exit ;;
-    i*86:*:5:[678]*)
-  # UnixWare 7.x, OpenUNIX and OpenServer 6.
-  case `/bin/uname -X | grep "^Machine"` in
-      *486*)       UNAME_MACHINE=i486 ;;
-      *Pentium)      UNAME_MACHINE=i586 ;;
-      *Pent*|*Celeron) UNAME_MACHINE=i686 ;;
-  esac
-  echo ${UNAME_MACHINE}-unknown-sysv${UNAME_RELEASE}${UNAME_SYSTEM}${UNAME_VERSION}
-  exit ;;
-    i*86:*:3.2:*)
-  if test -f /usr/options/cb.name; then
-    UNAME_REL=`sed -n 's/.*Version //p' </usr/options/cb.name`
-    echo ${UNAME_MACHINE}-pc-isc$UNAME_REL
-  elif /bin/uname -X 2>/dev/null >/dev/null ; then
-    UNAME_REL=`(/bin/uname -X|grep Release|sed -e 's/.*= //')`
-    (/bin/uname -X|grep i80486 >/dev/null) && UNAME_MACHINE=i486
-    (/bin/uname -X|grep '^Machine.*Pentium' >/dev/null) \
-      && UNAME_MACHINE=i586
-    (/bin/uname -X|grep '^Machine.*Pent *II' >/dev/null) \
-      && UNAME_MACHINE=i686
-    (/bin/uname -X|grep '^Machine.*Pentium Pro' >/dev/null) \
-      && UNAME_MACHINE=i686
-    echo ${UNAME_MACHINE}-pc-sco$UNAME_REL
-  else
-    echo ${UNAME_MACHINE}-pc-sysv32
-  fi
-  exit ;;
-    pc:*:*:*)
-  # Left here for compatibility:
-  # uname -m prints for DJGPP always 'pc', but it prints nothing about
-  # the processor, so we play safe by assuming i586.
-  # Note: whatever this is, it MUST be the same as what config.sub
-  # prints for the "djgpp" host, or else GDB configury will decide that
-  # this is a cross-build.
-  echo i586-pc-msdosdjgpp
-  exit ;;
-    Intel:Mach:3*:*)
-  echo i386-pc-mach3
-  exit ;;
-    paragon:*:*:*)
-  echo i860-intel-osf1
-  exit ;;
-    i860:*:4.*:*) # i860-SVR4
-  if grep Stardent /usr/include/sys/uadmin.h >/dev/null 2>&1 ; then
-    echo i860-stardent-sysv${UNAME_RELEASE} # Stardent Vistra i860-SVR4
-  else # Add other i860-SVR4 vendors below as they are discovered.
-    echo i860-unknown-sysv${UNAME_RELEASE}  # Unknown i860-SVR4
-  fi
-  exit ;;
-    mini*:CTIX:SYS*5:*)
-  # "miniframe"
-  echo m68010-convergent-sysv
-  exit ;;
-    mc68k:UNIX:SYSTEM5:3.51m)
-  echo m68k-convergent-sysv
-  exit ;;
-    M680?0:D-NIX:5.3:*)
-  echo m68k-diab-dnix
-  exit ;;
-    M68*:*:R3V[5678]*:*)
-  test -r /sysV68 && { echo 'm68k-motorola-sysv'; exit; } ;;
-    3[345]??:*:4.0:3.0 | 3[34]??A:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 3[34]??/*:*:4.0:3.0 | 4400:*:4.0:3.0 | 4850:*:4.0:3.0 | SKA40:*:4.0:3.0 | SDS2:*:4.0:3.0 | SHG2:*:4.0:3.0 | S7501*:*:4.0:3.0)
-  OS_REL=''
-  test -r /etc/.relid \
-  && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
-  /bin/uname -p 2>/dev/null | grep 86 >/dev/null \
-    && { echo i486-ncr-sysv4.3${OS_REL}; exit; }
-  /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
-    && { echo i586-ncr-sysv4.3${OS_REL}; exit; } ;;
-    3[34]??:*:4.0:* | 3[34]??,*:*:4.0:*)
-  /bin/uname -p 2>/dev/null | grep 86 >/dev/null \
-    && { echo i486-ncr-sysv4; exit; } ;;
-    NCR*:*:4.2:* | MPRAS*:*:4.2:*)
-  OS_REL='.3'
-  test -r /etc/.relid \
-      && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
-  /bin/uname -p 2>/dev/null | grep 86 >/dev/null \
-      && { echo i486-ncr-sysv4.3${OS_REL}; exit; }
-  /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
-      && { echo i586-ncr-sysv4.3${OS_REL}; exit; }
-  /bin/uname -p 2>/dev/null | /bin/grep pteron >/dev/null \
-      && { echo i586-ncr-sysv4.3${OS_REL}; exit; } ;;
-    m68*:LynxOS:2.*:* | m68*:LynxOS:3.0*:*)
-  echo m68k-unknown-lynxos${UNAME_RELEASE}
-  exit ;;
-    mc68030:UNIX_System_V:4.*:*)
-  echo m68k-atari-sysv4
-  exit ;;
-    TSUNAMI:LynxOS:2.*:*)
-  echo sparc-unknown-lynxos${UNAME_RELEASE}
-  exit ;;
-    rs6000:LynxOS:2.*:*)
-  echo rs6000-unknown-lynxos${UNAME_RELEASE}
-  exit ;;
-    PowerPC:LynxOS:2.*:* | PowerPC:LynxOS:3.[01]*:* | PowerPC:LynxOS:4.[02]*:*)
-  echo powerpc-unknown-lynxos${UNAME_RELEASE}
-  exit ;;
-    SM[BE]S:UNIX_SV:*:*)
-  echo mips-dde-sysv${UNAME_RELEASE}
-  exit ;;
-    RM*:ReliantUNIX-*:*:*)
-  echo mips-sni-sysv4
-  exit ;;
-    RM*:SINIX-*:*:*)
-  echo mips-sni-sysv4
-  exit ;;
-    *:SINIX-*:*:*)
-  if uname -p 2>/dev/null >/dev/null ; then
-    UNAME_MACHINE=`(uname -p) 2>/dev/null`
-    echo ${UNAME_MACHINE}-sni-sysv4
-  else
-    echo ns32k-sni-sysv
-  fi
-  exit ;;
-    PENTIUM:*:4.0*:*) # Unisys `ClearPath HMP IX 4000' SVR4/MP effort
-      # says <[e-mail]>
-  echo i586-unisys-sysv4
-  exit ;;
-    *:UNIX_System_V:4*:FTX*)
-  # From Gerald Hewes <[e-mail]>.
-  # How about differentiating between stratus architectures? -djm
-  echo hppa1.1-stratus-sysv4
-  exit ;;
-    *:*:*:FTX*)
-  # From [e-mail].
-  echo i860-stratus-sysv4
-  exit ;;
-    i*86:VOS:*:*)
-  # From [e-mail].
-  echo ${UNAME_MACHINE}-stratus-vos
-  exit ;;
-    *:VOS:*:*)
-  # From [e-mail].
-  echo hppa1.1-stratus-vos
-  exit ;;
-    mc68*:A/UX:*:*)
-  echo m68k-apple-aux${UNAME_RELEASE}
-  exit ;;
-    news*:NEWS-OS:6*:*)
-  echo mips-sony-newsos6
-  exit ;;
-    R[34]000:*System_V*:*:* | R4000:UNIX_SYSV:*:* | R*000:UNIX_SV:*:*)
-  if [ -d /usr/nec ]; then
-    echo mips-nec-sysv${UNAME_RELEASE}
-  else
-    echo mips-unknown-sysv${UNAME_RELEASE}
-  fi
-  exit ;;
-    BeBox:BeOS:*:*) # BeOS running on hardware made by Be, PPC only.
-  echo powerpc-be-beos
-  exit ;;
-    BeMac:BeOS:*:*) # BeOS running on Mac or Mac clone, PPC only.
-  echo powerpc-apple-beos
-  exit ;;
-    BePC:BeOS:*:*)  # BeOS running on Intel PC compatible.
-  echo i586-pc-beos
-  exit ;;
-    BePC:Haiku:*:*) # Haiku running on Intel PC compatible.
-  echo i586-pc-haiku
-  exit ;;
-    x86_64:Haiku:*:*) # Haiku running on x86_64.
-  echo x86_64-unknown-haiku
-  exit ;;
-    SX-4:SUPER-UX:*:*)
-  echo sx4-nec-superux${UNAME_RELEASE}
-  exit ;;
-    SX-5:SUPER-UX:*:*)
-  echo sx5-nec-superux${UNAME_RELEASE}
-  exit ;;
-    SX-6:SUPER-UX:*:*)
-  echo sx6-nec-superux${UNAME_RELEASE}
-  exit ;;
-    SX-7:SUPER-UX:*:*)
-  echo sx7-nec-superux${UNAME_RELEASE}
-  exit ;;
-    SX-8:SUPER-UX:*:*)
-  echo sx8-nec-superux${UNAME_RELEASE}
-  exit ;;
-    SX-8R:SUPER-UX:*:*)
-  echo sx8r-nec-superux${UNAME_RELEASE}
-  exit ;;
-    Power*:Rhapsody:*:*)
-  echo powerpc-apple-rhapsody${UNAME_RELEASE}
-  exit ;;
-    *:Rhapsody:*:*)
-  echo ${UNAME_MACHINE}-apple-rhapsody${UNAME_RELEASE}
-  exit ;;
-    *:Darwin:*:*)
-  UNAME_PROCESSOR=`uname -p` || UNAME_PROCESSOR=unknown
-  case $UNAME_PROCESSOR in
-      i386)
-    eval $set_cc_for_build
-    if [ "$CC_FOR_BUILD" != 'no_compiler_found' ]; then
-      if (echo '#ifdef __LP64__'; echo IS_64BIT_ARCH; echo '#endif') | \
-          (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \
-          grep IS_64BIT_ARCH >/dev/null
-      then
-          UNAME_PROCESSOR="x86_64"
-      fi
-    fi ;;
-    arm)
-    eval $set_cc_for_build
-    if [ "$CC_FOR_BUILD" != 'no_compiler_found' ]; then
-      if (echo '#ifdef __LP64__'; echo IS_64BIT_ARCH; echo '#endif') | \
-        (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \
-        grep IS_64BIT_ARCH >/dev/null
-      then
-        if (echo '#ifdef __PTRAUTH_INTRINSICS__'; echo HAS_AUTH; echo '#endif') | \
-          (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \
-          grep HAS_AUTH >/dev/null
-        then
-          UNAME_PROCESSOR="arm64e"
-        else
-          UNAME_PROCESSOR="arm64"
-        fi
-      fi
-    fi ;;
-      unknown) UNAME_PROCESSOR=powerpc ;;
-  esac
-  echo ${UNAME_PROCESSOR}-apple-darwin${UNAME_RELEASE}
-  exit ;;
-    *:procnto*:*:* | *:QNX:[0123456789]*:*)
-  UNAME_PROCESSOR=`uname -p`
-  if test "$UNAME_PROCESSOR" = "x86"; then
-    UNAME_PROCESSOR=i386
-    UNAME_MACHINE=pc
-  fi
-  echo ${UNAME_PROCESSOR}-${UNAME_MACHINE}-nto-qnx${UNAME_RELEASE}
-  exit ;;
-    *:QNX:*:4*)
-  echo i386-pc-qnx
-  exit ;;
-    NEO-?:NONSTOP_KERNEL:*:*)
-  echo neo-tandem-nsk${UNAME_RELEASE}
-  exit ;;
-    NSE-?:NONSTOP_KERNEL:*:*)
-  echo nse-tandem-nsk${UNAME_RELEASE}
-  exit ;;
-    NSR-?:NONSTOP_KERNEL:*:*)
-  echo nsr-tandem-nsk${UNAME_RELEASE}
-  exit ;;
-    *:NonStop-UX:*:*)
-  echo mips-compaq-nonstopux
-  exit ;;
-    BS2000:POSIX*:*:*)
-  echo bs2000-siemens-sysv
-  exit ;;
-    DS/*:UNIX_System_V:*:*)
-  echo ${UNAME_MACHINE}-${UNAME_SYSTEM}-${UNAME_RELEASE}
-  exit ;;
-    *:Plan9:*:*)
-  # "uname -m" is not consistent, so use $cputype instead. 386
-  # is converted to i386 for consistency with other x86
-  # operating systems.
-  if test "$cputype" = "386"; then
-      UNAME_MACHINE=i386
-  else
-      UNAME_MACHINE="$cputype"
-  fi
-  echo ${UNAME_MACHINE}-unknown-plan9
-  exit ;;
-    *:TOPS-10:*:*)
-  echo pdp10-unknown-tops10
-  exit ;;
-    *:TENEX:*:*)
-  echo pdp10-unknown-tenex
-  exit ;;
-    KS10:TOPS-20:*:* | KL10:TOPS-20:*:* | TYPE4:TOPS-20:*:*)
-  echo pdp10-dec-tops20
-  exit ;;
-    XKL-1:TOPS-20:*:* | TYPE5:TOPS-20:*:*)
-  echo pdp10-xkl-tops20
-  exit ;;
-    *:TOPS-20:*:*)
-  echo pdp10-unknown-tops20
-  exit ;;
-    *:ITS:*:*)
-  echo pdp10-unknown-its
-  exit ;;
-    SEI:*:*:SEIUX)
-  echo mips-sei-seiux${UNAME_RELEASE}
-  exit ;;
-    *:DragonFly:*:*)
-  echo ${UNAME_MACHINE}-unknown-dragonfly`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`
-  exit ;;
-    *:*VMS:*:*)
-  UNAME_MACHINE=`(uname -p) 2>/dev/null`
-  case "${UNAME_MACHINE}" in
-      A*) echo alpha-dec-vms ; exit ;;
-      I*) echo ia64-dec-vms ; exit ;;
-      V*) echo vax-dec-vms ; exit ;;
-  esac ;;
-    *:XENIX:*:SysV)
-  echo i386-pc-xenix
-  exit ;;
-    i*86:skyos:*:*)
-  echo ${UNAME_MACHINE}-pc-skyos`echo ${UNAME_RELEASE}` | sed -e 's/ .*$//'
-  exit ;;
-    i*86:rdos:*:*)
-  echo ${UNAME_MACHINE}-pc-rdos
-  exit ;;
-    i*86:AROS:*:*)
-  echo ${UNAME_MACHINE}-pc-aros
-  exit ;;
-esac
-
-#echo '(No uname command or uname output not recognized.)' 1>&2
-#echo "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" 1>&2
-
-eval $set_cc_for_build
-cat >$dummy.c <<EOF
-#ifdef _SEQUENT_
-# include <sys/types.h>
-# include <sys/utsname.h>
-#endif
-main ()
-{
-#if defined (sony)
-#if defined (MIPSEB)
-  /* BFD wants "bsd" instead of "newsos".  Perhaps BFD should be changed,
-     I don't know....  */
-  printf ("mips-sony-bsd\n"); exit (0);
-#else
-#include <sys/param.h>
-  printf ("m68k-sony-newsos%s\n",
-#ifdef NEWSOS4
-  "4"
-#else
-  ""
-#endif
-  ); exit (0);
-#endif
-#endif
-
-#if defined (__arm) && defined (__acorn) && defined (__unix)
-  printf ("arm-acorn-riscix\n"); exit (0);
-#endif
-
-#if defined (hp300) && !defined (hpux)
-  printf ("m68k-hp-bsd\n"); exit (0);
-#endif
-
-#if defined (NeXT)
-#if !defined (__ARCHITECTURE__)
-#define __ARCHITECTURE__ "m68k"
-#endif
-  int version;
-  version=`(hostinfo | sed -n 's/.*NeXT Mach \([0-9]*\).*/\1/p') 2>/dev/null`;
-  if (version < 4)
-    printf ("%s-next-nextstep%d\n", __ARCHITECTURE__, version);
-  else
-    printf ("%s-next-openstep%d\n", __ARCHITECTURE__, version);
-  exit (0);
-#endif
-
-#if defined (MULTIMAX) || defined (n16)
-#if defined (UMAXV)
-  printf ("ns32k-encore-sysv\n"); exit (0);
-#else
-#if defined (CMU)
-  printf ("ns32k-encore-mach\n"); exit (0);
-#else
-  printf ("ns32k-encore-bsd\n"); exit (0);
-#endif
-#endif
-#endif
-
-#if defined (__386BSD__)
-  printf ("i386-pc-bsd\n"); exit (0);
-#endif
-
-#if defined (sequent)
-#if defined (i386)
-  printf ("i386-sequent-dynix\n"); exit (0);
-#endif
-#if defined (ns32000)
-  printf ("ns32k-sequent-dynix\n"); exit (0);
-#endif
-#endif
-
-#if defined (_SEQUENT_)
-    struct utsname un;
-
-    uname(&un);
-
-    if (strncmp(un.version, "V2", 2) == 0) {
-  printf ("i386-sequent-ptx2\n"); exit (0);
-    }
-    if (strncmp(un.version, "V1", 2) == 0) { /* XXX is V1 correct? */
-  printf ("i386-sequent-ptx1\n"); exit (0);
-    }
-    printf ("i386-sequent-ptx\n"); exit (0);
-
-#endif
-
-#if defined (vax)
-# if !defined (ultrix)
-#  include <sys/param.h>
-#  if defined (BSD)
-#   if BSD == 43
-      printf ("vax-dec-bsd4.3\n"); exit (0);
-#   else
-#    if BSD == 199006
-      printf ("vax-dec-bsd4.3reno\n"); exit (0);
-#    else
-      printf ("vax-dec-bsd\n"); exit (0);
-#    endif
-#   endif
-#  else
-    printf ("vax-dec-bsd\n"); exit (0);
-#  endif
-# else
-    printf ("vax-dec-ultrix\n"); exit (0);
-# endif
-#endif
-
-#if defined (alliant) && defined (i860)
-  printf ("i860-alliant-bsd\n"); exit (0);
-#endif
-
-  exit (1);
-}
-EOF
-
-$CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null && SYSTEM_NAME=`$dummy` &&
-  { echo "$SYSTEM_NAME"; exit; }
-
-# Apollos put the system type in the environment.
-
-test -d /usr/apollo && { echo ${ISP}-apollo-${SYSTYPE}; exit; }
-
-# Convex versions that predate uname can use getsysinfo(1)
-
-if [ -x /usr/convex/getsysinfo ]
-then
-    case `getsysinfo -f cpu_type` in
-    c1*)
-  echo c1-convex-bsd
-  exit ;;
-    c2*)
-  if getsysinfo -f scalar_acc
-  then echo c32-convex-bsd
-  else echo c2-convex-bsd
-  fi
-  exit ;;
-    c34*)
-  echo c34-convex-bsd
-  exit ;;
-    c38*)
-  echo c38-convex-bsd
-  exit ;;
-    c4*)
-  echo c4-convex-bsd
-  exit ;;
-    esac
-fi
-
-cat >&2 <<EOF
-$0: unable to guess system type
-
-This script, last modified $timestamp, has failed to recognize
-the operating system you are using. It is advised that you
-download the most up to date version of the config scripts from
-
-  http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD
-and
-  http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD
-
-If the version you run ($0) is already up to date, please
-send the following data and any information you think might be
-pertinent to <[e-mail]> in order to provide the needed
-information to handle your system.
-
-config.guess timestamp = $timestamp
-
-uname -m = `(uname -m) 2>/dev/null || echo unknown`
-uname -r = `(uname -r) 2>/dev/null || echo unknown`
-uname -s = `(uname -s) 2>/dev/null || echo unknown`
-uname -v = `(uname -v) 2>/dev/null || echo unknown`
-
-/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null`
-/bin/uname -X     = `(/bin/uname -X) 2>/dev/null`
-
-hostinfo               = `(hostinfo) 2>/dev/null`
-/bin/universe          = `(/bin/universe) 2>/dev/null`
-/usr/bin/arch -k       = `(/usr/bin/arch -k) 2>/dev/null`
-/bin/arch              = `(/bin/arch) 2>/dev/null`
-/usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null`
-/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null`
-
-UNAME_MACHINE = ${UNAME_MACHINE}
-UNAME_RELEASE = ${UNAME_RELEASE}
-UNAME_SYSTEM  = ${UNAME_SYSTEM}
-UNAME_VERSION = ${UNAME_VERSION}
-EOF
-
-exit 1
-
-# Local variables:
-# eval: (add-hook 'write-file-hooks 'time-stamp)
-# time-stamp-start: "timestamp='"
-# time-stamp-format: "%:y-%02m-%02d"
-# time-stamp-end: "'"
-# End:

llvm/cmake/modules/GetHostTriple.cmake

if( CMAKE_SIZEOF_VOID_P EQUAL 8 )
       set( value "powerpc64-ibm-aix" )
     else()
       set( value "powerpc-ibm-aix" )
     endif()
   else( MSVC )
     if(CMAKE_HOST_SYSTEM_NAME STREQUAL Windows AND NOT MSYS)
       message(WARNING "unable to determine host target triple")
     else()
-      set(config_guess ${LLVM_MAIN_SRC_DIR}/cmake/config.guess)
-      execute_process(COMMAND sh ${config_guess}
+      set(CXX_DUMPMACHINE ${CMAKE_CXX_COMPILER} -dumpmachine ${CMAKE_CXX_COMPILER_ARG1} ${CMAKE_CXX_FLAGS})
+      execute_process(COMMAND ${CXX_DUMPMACHINE}
         RESULT_VARIABLE TT_RV
-        OUTPUT_VARIABLE TT_OUT
+        OUTPUT_VARIABLE value
         OUTPUT_STRIP_TRAILING_WHITESPACE)
       if( NOT TT_RV EQUAL 0 )
-        message(FATAL_ERROR "Failed to execute ${config_guess}")
+        string(REPLACE ";" " " CXX_DUMPMACHINE "${CXX_DUMPMACHINE}")
+        message(FATAL_ERROR "Failed to execute `${CXX_DUMPMACHINE}` for triple detection."
+                        " Use -DLLVM_HOST_TRIPLE= if you want to define the host triple.")
       endif( NOT TT_RV EQUAL 0 )
-      set( value ${TT_OUT} )
     endif()
   endif( MSVC )
   set( ${var} ${value} PARENT_SCOPE )
 endfunction( get_host_triple var )